1 /* 2 * 9p 3 * 4 * Copyright IBM, Corp. 2010 5 * 6 * Authors: 7 * Gautham R Shenoy <ego@in.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qapi/error.h" 15 #include "qemu-fsdev.h" 16 #include "qemu/queue.h" 17 #include "qemu/config-file.h" 18 #include "qemu/error-report.h" 19 #include "qemu/option.h" 20 21 static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries = 22 QTAILQ_HEAD_INITIALIZER(fsdriver_entries); 23 24 static FsDriverTable FsDrivers[] = { 25 { .name = "local", .ops = &local_ops}, 26 #ifdef CONFIG_OPEN_BY_HANDLE 27 { .name = "handle", .ops = &handle_ops}, 28 #endif 29 { .name = "synth", .ops = &synth_ops}, 30 { .name = "proxy", .ops = &proxy_ops}, 31 }; 32 33 int qemu_fsdev_add(QemuOpts *opts) 34 { 35 int i; 36 struct FsDriverListEntry *fsle; 37 const char *fsdev_id = qemu_opts_id(opts); 38 const char *fsdriver = qemu_opt_get(opts, "fsdriver"); 39 const char *writeout = qemu_opt_get(opts, "writeout"); 40 bool ro = qemu_opt_get_bool(opts, "readonly", 0); 41 Error *local_err = NULL; 42 43 if (!fsdev_id) { 44 error_report("fsdev: No id specified"); 45 return -1; 46 } 47 48 if (fsdriver) { 49 for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) { 50 if (strcmp(FsDrivers[i].name, fsdriver) == 0) { 51 break; 52 } 53 } 54 55 if (i == ARRAY_SIZE(FsDrivers)) { 56 error_report("fsdev: fsdriver %s not found", fsdriver); 57 return -1; 58 } 59 } else { 60 error_report("fsdev: No fsdriver specified"); 61 return -1; 62 } 63 64 fsle = g_malloc0(sizeof(*fsle)); 65 fsle->fse.fsdev_id = g_strdup(fsdev_id); 66 fsle->fse.ops = FsDrivers[i].ops; 67 if (writeout) { 68 if (!strcmp(writeout, "immediate")) { 69 fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT; 70 } 71 } 72 if (ro) { 73 fsle->fse.export_flags |= V9FS_RDONLY; 74 } else { 75 fsle->fse.export_flags &= ~V9FS_RDONLY; 76 } 77 78 if (fsle->fse.ops->parse_opts) { 79 if (fsle->fse.ops->parse_opts(opts, &fsle->fse, &local_err)) { 80 error_report_err(local_err); 81 g_free(fsle->fse.fsdev_id); 82 g_free(fsle); 83 return -1; 84 } 85 } 86 87 QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next); 88 return 0; 89 } 90 91 FsDriverEntry *get_fsdev_fsentry(char *id) 92 { 93 if (id) { 94 struct FsDriverListEntry *fsle; 95 96 QTAILQ_FOREACH(fsle, &fsdriver_entries, next) { 97 if (strcmp(fsle->fse.fsdev_id, id) == 0) { 98 return &fsle->fse; 99 } 100 } 101 } 102 return NULL; 103 } 104